AZ 75 then FR 4858 at Fiumicino
Barcelona → Rome → Catania
Timetable, Rome time
08:05AZ 75 from Barcelona at the gate
05:45FR 4858 to Catania leaves the gate
21 h 40 apart on the timetable, overnight
FR 4858 leaves 21 h 40 after AZ 75 arrives on the timetable: more than half a day, so not a connection we count.